Re: I never thought of this scenario

Lawrence D'Oliveiro <ldo@nz.invalid> wrote:

On Sat, 13 Apr 2024 09:39:27 +0200, Marc Haber wrote:
 

Lawrence D'Oliveiro <ldo@nz.invalid> wrote:
>

DHCP is not routable, otherwise it wouldn’t need a helper to route it.

 
Repeating this doesnt make it right.

 
I went through the details of RFC2131 in another posting. Go read it (the
RFC and my posting).

And, yet, you seem to have missed this statement from the RFC:

https://www.rfc-editor.org/rfc/rfc2131 - page 6:

        DHCP should not require a server on each subnet.  To allow for
        scale and economy, DHCP must work across routers or through the
        intervention of BOOTP relay agents.

Note they use "must" above in the statement "DHCP must work across
routers".  Page 4 defines "must" as:

        o "MUST"

        This word or the adjective "REQUIRED" means that the item is an
        absolute requirement of this specification.

Therefore the RFC explicitly allows for DHCP to be routed.